/Engine/Source/Runtime/Core/Public/GenericPlatform/GenericPlatformMemory.h
Unmaps a name shared memory region
true if successful
static bool UnmapNamedSharedMemoryRegion ( [FSharedMemoryRegion](API\Runtime\Core\GenericPlatform\FGenericPlatformMemory\FSharedMemoryRegion) * MemoryRegion )